sum

Compute checksums and the number of blocks for a file. A predecessor to the more modern cksum. More information: https://www.gnu.org/software/coreutils/manual/html_node/sum-invocation.html.

• Compute a checksum with BSD-compatible algorithm and 1024-byte blocks:

sum path/to/file

• Compute a checksum with System V-compatible algorithm and 512-byte blocks:

sum --sysv path/to/file